Refrigeration Piping

CONDENSATE PIPING

2.Cut the black insulation around the knock-out.

3.Snip the tabs holding the knock- out in place.

4.Remove the metal knock-out and the black insulation behind it.

5.Attach the duct collars (ﬁ eld sup- plied) to the chassis using self tap- ping screws. (Repeat steps 1-5 for remaining duct work.)

Once the unit is mounted and level the Cassette piping connections can be made.

PIPING DO’S AND DON’TS

PIPE INSTALLATION NOTES

•Avoid piping on a rainy day.

•Use refrigerant grade copper tubing.

•Use a tubing bender and avoid unnec- essary bending.

•Cap ends of lines until ready for ﬁ nal connections.

NOTE: Refrigerant and condensate pipes should be insulated right up to the Cassette chassis.

The CAC is equipped with a Flo-Rater/ Piston Expansion device. Connections are sweat type.

The suction line (large) must be insulated the entire length with closed cell, foam tube insulation. Do not insulate the liquid line (small). Connect the outdoor unit according to the instructions supplied with unit.

All horizontal piping runs must be level and without dips to trap the oil.

Suction Line

Liquid Line

1.Maximum equivalent pipe run should be no more than 100’, with a maximum rise of 35’.

2.Horizontal pipe runs should be slight- ly inclined, so as to encourage oil to ﬂ ow in the direction of the compres- sor, for better oil return.

3.Good refrigeration practices must be employed to ensure the correct pressure drop and good oil return.

When matching a the CAC24 with an 18,000 Btuh condenser, the interconnecting suction line needs to be 5/8” O.D. to match the condenser service valve connection. Therefore the 3/4” O.D. suction connection of the CAC24 unit needs to be reduced to 5/8” at the CAC24 unit connection to match the 5/8” line of the condenser.

Any change in the diameter of the tubing

MUST be made at the indoor connec- tion. Line-set diameter is determined by the condenser valve size.

Use of a larger line can harm

the compressor!

5/8” bushing goes on suction line

(Only when matched to an 18,000 Btuh condenser)

CAC Cassette Evaporator

www.enviromaster.com

CAC specifications

EMI CAC, or Electromagnetic Interference Common-mode Current, is a critical concern in electronic device design and operation. It refers to the unwanted electromagnetic energy that can disrupt the normal functioning of electronic circuits, particularly in complex systems. EMI can arise from various sources, including power lines, radio frequency transmitters, and even other components within the same device.

One of the main features of EMI CAC is its dual nature. It can be both a source of interference and a metric to assess the integrity of electronic systems. The impacts of EMI are far-reaching, affecting communication signals, power supply reliability, and overall device performance. As technology progresses and devices become more compact, the likelihood of EMI issues increases, making it essential for engineers to develop effective solutions.

Several technologies are employed to mitigate EMI CAC in electronic systems. Shielding is one of the most common methods, involving the use of conductive materials to block electromagnetic fields. This can take the form of metal enclosures or coatings that prevent the escape of emissions. Another strategy involves the use of filters, such as ferrite beads and capacitors, which can suppress common-mode currents before they enter the sensitive parts of a circuit.

The characteristics of EMI CAC vary depending on several factors, including frequency, amplitude, and the specific environment in which the electronic devices operate. High-frequency EMI is particularly challenging due to its ability to penetrate enclosures and disrupt signals. Additionally, common-mode noise can often appear in differential signals, exacerbating the situation and making detection more difficult.

Achieving EMC (Electromagnetic Compatibility) is a major goal for designers dealing with EMI CAC. This involves not only reducing emissions from devices but also improving their immunity to external sources of interference. Effective grounding techniques and careful layout planning are crucial in minimizing EMI effects.

In summary, EMI CAC represents a significant challenge in modern electronics, with a need for advanced solutions to ensure device performance and reliability. By understanding its features, employing effective technologies for mitigation, and addressing its characteristics, engineers can create robust designs that thrive in the increasingly complex electromagnetic landscape of today’s technological world.